PC reboots wont get into bios

[tensux]

when i try to turn on pc it restarts itself in a loop, no beeps,i have tried new ram and a new cpu, disconnected all extra cards etc. mobo or psu?

[Ninjahedge]

Disconnect everything, memory included.

Look up the error codes online. See which error comes up with nothing but power to the MB.

Then start hooking the pieces up one by one depending on the order of the errors. (If it says "Hey, no KB!!!" attach the KB first).

Sounds odd that you are getting continuous reboot though. Sounds like the MB, but there are better techies here than me (by far). I hope I am not too far off in what I am suggesting, however.


BTW, before they ask, specific part/model numbers would probably be helpful.....

[tensux]

no error codes, it will not beep

all pretty old i built it all years ago. would rather just rebuild with the parts, its fine for the kids, they have put quit a beatdown on my laptop since the pc problem

MB DFI BLOOD IRO P35-T2RL P35 775 R - Retail (Qty=1, Price=$121.99) MEM 1Gx2|PAT 240P PDC22G8500ELK R - Retail (Qty=1, Price=$147.99) CASE CM|RC-534-KKN2-GP BK RT - Retail (Qty=1, Price=$49.99) CPU INTEL|C2D E6550 2.33G 65N 4M R - Retail (Qty=1, Price=$169.99) HD 320G|WD 7K 16M SATA2 WD3200AAKS - OEM (Qty=1, Price=$79.99) DVD BURN SAMSUNG|SH-S203B % - OEM (Qty=1, Price=$29.99)

[=A!M=OakWind]

Install punctuation 4TW.

[Bald_Yew]

Testing PSU is cheaper than testing mo'bo. Also, don't see your PSU listed. Got a spare PSU you can test the system with?

[Dr. Death]

I agree on the PSU. With a good mobo, psu and cpu, and nothing else, you should get beeps.

[shifty]

i would explain how to test your PSU with a voltmeter, but i'm afraid you'll hurt yourself.

[tensux]

this is the power suplly i am using:

CORSAIR HX Series CMPSU-520HX 520W ATX12V v2.2 and EPS12V 2.91 SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC Compatible with Core i7 Power Supply

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139001


i dont have a spare

[Ninjahedge]

Well...... If you are thinking of making a new machine, you might want to get a new PS anyway.......



And shift, this is a power supply we are talking about here, not a woman. I think TS would have less of a chance hurting himself with one than the other.... :D

[shifty]

when you start talking about bridging the two pins required to test the 5v+ and 12v+ leads, yes indeed, the man can hurt himself. He's really old, a little charge my send his ticker into arrest.

[Ninjahedge]

That's rather rude there shi......




Ohhhhh, ticker.


Nevermind [/gilda]

[tensux]

omg, so now i have bought ram, cpu, and mobo. and same thing, must be the psu

[Bald_Yew]

If you proceed with caution, testing PSU = shorting pins with paperclip and probing with ohm meter.

http://en.wikipedia.org/wiki/ATX

Look for sags/spikes.

[Ninjahedge]

I like ohms.

I wanted to get more, but ran into some resistance.

[shifty]

If you proceed with caution, testing PSU = shorting pins with paperclip and probing with ohm meter.

http://en.wikipedia.org/wiki/ATX

Look for sags/spikes.

Multimeter/Voltmeter, not Ohm meter.

[tensux]

not sure its worth the trouble at this point, the only parts i havent bought new are the psu, case and vid card, has to be the psu no? unless i unluckily bought bad replacements

[tensux]

i realized the new mobo was giving on short beep, looked up the code and it meant "system normal" im like wtf, then i finally realized the new mobo had on board video, it was the video card that was dead all along

[5150]

Kinda tough one to chase - I would have gone with PSU on a guess-I guess diagnoisis should have revealed the VC-bummer it took so much time and guessing-spare parts are always good.

[Muscat]

I think a bad mobo don'T do anything. No power most of the time no fan turning but you can have the same problem with a dead PSU. When you have mysterious electric problems it is most of the time the PSU or stuff include with it. Bad PSU can dmg a lot of stuff so better to change it as soon as possible. :rolleyes:

[Dr. Death]

You can always test a PSU by shorting the green wire (remote power on) to a black one (ground.) in that case, the fans and hard drive should spin up (if connected) and you should get a power light at least off the mobo (again if connected.)

Motherboards can fail in all kinds of ways. With a good CPU, RAM, and video section or card, (and PSU) they will POST. From there, they could still have bad IDE or SATA interfaces, onboard video, nic, or sound issues, or no USB/Firewire.